Gram positive

• Most Streptococci

• Enterococcus faecalis

• Staph aureus (MSSA)

Gram negative

• Some Enterobacteriaceae

  • Increasing resistance in E. coli

• Neisseria species

• Haemophilus

• Moraxella

• Pasteurella

Anaerobes

• Bacteroides fragilis

• Prevotella

• non-difficile Clostridia

• Peptostreptococci

• Actinomyces